I've noticed a bit of discussion in various threads about old glue going corrosive. For instance: http://audiokarma.org/forums/index.php?threads/from-yamaha-to-nad-to-whats-my-next-move.800504/ IME, the glue I've seen is fine, but what is corrosive is the leaked electrolyte from capacitors. Which are usually the big things that needed to glued in place during soldering... In the example above, the 'corrosive glue' is, as I have experienced, around an electrolytic capacitor. This causes two failures: loss of value of the cap, and damage to the surrounding circuitry. I'd be interested to hear of anyone who has found evidence of 'corrosive glue' on components other than electrolytics, and far enough away from electrolytics to be affected by leaked electrolyte.